Evaporator.



A. E. HAMMOND.

EVAPORATOR. APPLICATION FILED MAY 21. 1917.

2 SHEETSSHEET I.

A. E. HAMMOND.

EVAPORATOR.

APPLICATION FILED MAY 21. 19H- Patented May 14, 1918,

2 SHEETSSHEET 2.

maaAm //7 van tor,

To all whom it may concern:

nnrnn s ALBERT E. HAMMOND, OF PORTLAN D, OREGON.

' nvnrona'ron.

- Application filed May 21 Be it known that I, ALBERT E. HAMMo vn, acitizen of the United States, residing in the city of Portland, countyof Multnomah, and State of Oregon, have invented certain new and usefulImprovements in Evaporators, of which the following is a specification,

invention relates to evaporators of the character designed for dryingfruit, vege--- tables, and the like, and has as its principal objecttoprovide an improved construction and arrangement for evaporators,whereby a more uniform result can be secured in the drying of a largequantity of matter.- order to explain my invention and to point out itsimproved features, I have illustrated one practical embodiment thereofinthe accompanying two sheets of drawi :s, wh1-ch I will now describe.Figure 1 is a horizontal sectional view through an evaporatorembodying'my invention, with themiddle portion broken outto reduce thesize of the figure; Fig. 2 is a side elevation thereof;

' ,Fig. 3 is a vertical cross sectional View thereof taken on the line33 of Fig. 2; and Fig. 4 is an end view looking at the right handend' ofFig. 2.

Referring now more in detail to the drawings, my invention comprises ahousing,

- preferably of long rectangular form, having the' si'de walls 11, astraight end wall 2,

and the converging end walls 3-3, all of said walls-being of doubleconstruction, whereby to be filled with anysuitable heat-retainingmatter, as may be desired. Extending through the middle portion of saidhousing, longitudinally thereof, is a double-walled partition 4. In thestraight end walls 2, I have provided a series of narrow, transverselyextending doors, as 55, which can .be. opened, as indicated at the righthand end of Fig. 2, for admitting air into said housing. At the oppositeend of said housing, I have provided a suction fan mechanism, designatedas a'whole 6, which may be of any usual. construction, and the fanofwhich may be driven as by means of a driving pulley 7. Near thestraight end of said housing and adjacent the air inlet doors 55, I-haveprovided a series-of heating coils 8, shown in top plan view in Fig. 1,and in end view in Fig, 3, with supply pipe 9 leading thereto. Adjacentsaid heating coils I have-provided a curved air retarding distributingmember 10, here illustrated as woven wire fabric,

Specification of Letters Patent. I Patented May 14:, 19 130 1917. SerialNo. 169,958.

although any open or perforated structure through which the air canpassmay be used, 1 said member operating to retard and moreuniformlydistribute the air as it passes 0 therethrough into the dryingchamber. similar member 11, is arranged at the fan end of the housing.It will be noticed that said members 10 and 11 are curved,'whereby tooperate more edectively in an even distribution of the air passingthrough the evaporator housing.

' Ou 'o'pposite sides of the central partition ,4, are "car tracks 12and 13, having at their ends turntables 14, 15, 16 and 17 saidturntables being arranged at the junctures of said car tracks withtransversely extending tracks 18 and '19, extending cross-wise throughthe housing, as indicated. Said housing is, provided at said crosstracks with doors 1-lf, whereby cars 20-20, on which the matter to bedried is placed on an suitable supporting means thereon, can e run intoand out of said housing.

From this construction and arrangement so it will be evident that carsof'matter to be dried can be moved into said housing, for example, onthe trackv 18, and then moved rearwardly on the track 12, to the track19, and thence across the track 13 and back to the track 18, thuspassing the car of materialto be dried slowly through the housing andturning it so that three sides of the car will .at different times beturned toward the end of the-housing fromwhich the heated air comes. Itwill also be evident that the matter tobe dried is first subjected tothe lower heat,- which increases as the car is moved rearwardly'towardthe heating end of the housing. The cars can either be removed tenseheat andthen moved along to the op- 1'05 posite 'end thereof where theheat is not so. great.

Referring toFig. 2 I have provided in the sides of the housing littlewindows 21, with slide covers therefor, which may be no used, ifdesired, for inspecting the matter to be dried without opening thelarger doors.

1. By reaching through one of these little windowssamples of matterbeing dried may be removed very conveniently.

Thus I'have provided-animproved eva orator of considerable lengththrough which, ,in either direction, cars 0 can be moved with means forgassing them from one trac -'t0 theother, an with means for removingsaid'cars from either end. of

the housing, and whileI have shown "one practical embodiment of'myinvention I do not limit the inventionto this particular form, except'as 'I maybelimited-"by hereto appended claims.

Ic1a'im:-

ing tracks in said 'housing,- .cross tracks extending through saidhousing-near the op:

' cross tracks,'whereby cars can be transferred from one track tothe'other, 'andair dis-' tributing and retarding means near the oppositeends'thereof -turn tables at the junc tures of saidilon'gitudinaltrackswith said posite ends of said housing.

2. An'evaporator comprising a long rectangular housing provided at oneend with means for admitting and heating air, and at its opposite endconstructed with converging end walls, means operatin at the converging.ends of said end walls or causinga .circulati0n of air through saidhousing,

matter to be dried 3mm a car traeks arranged in. said housing betweensaid air *retarding 'and ,distributin means to receive-cars of materialto be dried, subj stantial-ly as described. Y

3. An evaporator comprising a long tan 'ular housing having convergingend Ywal s at one end" with means ,thereat .for

causing'a circulation of air through said hous' throng 'said-rhousing,tables at the junctures of said cross trackswith said longitudinaltracks for turning. and transfep 'ri'ng cars from one track-to another,and a, curved air retardlng structure across, sald v I curved airdistributing and means near the oppositeends of said'housingyandhousing, means at the opposite end ofsaid for admitting ai means forheat-" ing sa d air as it enters said housing, car" tra'cks extendinglongitudinally within said Icar tracks extending cross-Wise 'housinadjacent the converging endwalls j thereo substantially as described.

4. In an evaporator of the character referred=- to,-a housing-withconverging wall members at one end thereof,'m'eans forcausing acirculation of'air through said housingtoward said converging walls, anda curved air retarding structure with air openings" there'throu-gh,arranged near the converging end walls' of said housing.

Signed at-Portland, Multnomah county, Oregon, this-15th day of May,1917.

- ALBERT In presence of:

' I. M; GRIFFIN,

-. J. C. STRENG,

n. HAMMOND.

